This Sigma 28mm f/1.8 EX DG aspherical Macro is a large aperture wide-angle lens for digital and 35mm film SLR cameras
This lens has a macro focusing capability with fast F1.8 maximum aperture, which is ideal for Digital SLR cameras.
This lens is capable of Macro photography, with minimum shooting distance of 20cm (reproduction ratio 1 : 2.9) and angle of view is 75.4. You can take picture not only the subject but also the surrounding scenery.
Large front element and Super wide-angle
The lens has an advanced optical construction, in order to obtain adequate peripheral brightness with open aperture. Also, the iris diaphragm has 9 diaphragm blades to obtain beautiful out of focus images in the foreground and background.
The lens incorporates a Dual-Focus (DF) mechanism. It is easy to hold the lens, since the focusing ring does not rotate during auto-focus, yet it provides adequate focusing torque of the focusing ring during manual focusing of the lens. Also, this also allows the use of a Petal-type Hood and the easy use of a polarizing filter.
It incorporates a floating focus system and uses two aspherical lens elements for minimizing distortion, aberration and astigmatism.
SIGMA 28mm f/1.8 EX DG SPECIFICATIONS:
Lens Construction 10 Elements in 9 Groups
Angle of View 75.4 degrees
Number of Diaphragm Blades 9 Blades
Minimum Aperture F22
Minimum Focusing Distance 20cm
Maximum Magnification 1:2.9
Filter Size 77mm
Dimensions Diameter 83.6mm X Length 82.5mm
This Sigma 28mm f/1.8 EX DG ASP Macro lens is available in the following mounts: